216943392 has 96 divisors (see below), whose sum is σ = 606336192. Its totient is φ = 67682304.

The previous prime is 216943381. The next prime is 216943421. The reversal of 216943392 is 293349612.

It is a tau number, because it is divible by the number of its divisors (96).

It is a self number, because there is not a number n which added to its sum of digits gives 216943392.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 500808 + ... + 501240.

It is an arithmetic number, because the mean of its divisors is an integer number (6316002).

Almost surely, 2^216943392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216943392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (303168096).

216943392 is an abundant number, since it is smaller than the sum of its proper divisors (389392800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216943392 is a wasteful number, since it uses less digits than its factorization.

216943392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770 (or 762 counting only the distinct ones).

The product of its digits is 69984, while the sum is 39.

The square root of 216943392 is about 14728.9983366147. The cubic root of 216943392 is about 600.8722424851.

The spelling of 216943392 in words is "two hundred sixteen million, nine hundred forty-three thousand, three hundred ninety-two".